Camp Hill climate

Camp Hill Frost Dates and Growing Season

NOAA 1991-2020 normals for Camp Hill 2NW, 2.6 km from Camp Hill, elevation 680 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Camp Hill 2NW. A median date has an even chance of a later freeze in spring, or an earlier one in fall.

The last spring freeze typically comes around April 11 and the first fall freeze around October 27, a growing season of about 201 days.

Median at 36°F
last April 22, first October 19
Median at 32°F
last April 11, first October 27
Median at 28°F
last March 31, first November 6

Last freeze in spring

The chance of a later freeze than the date shown. At 10 percent, one spring in ten still freezes after the date; planting after the 10 percent date for 32°F is the cautious choice.

Threshold10%20%30%40%50%60%70%80%90%
36°FMay 6May 1Apr 29Apr 26Apr 22Apr 20Apr 17Apr 12Apr 7
32°FApr 26Apr 21Apr 17Apr 14Apr 11Apr 8Apr 5Mar 31Mar 25
28°FApr 17Apr 11Apr 7Apr 4Mar 31Mar 26Mar 23Mar 18Mar 10
24°FApr 5Mar 31Mar 26Mar 21Mar 17Mar 13Mar 6Feb 28Feb 23
20°FMar 24Mar 17Mar 12Mar 6Mar 1Feb 26Feb 20Feb 14Feb 4
16°FMar 11Mar 3Feb 25Feb 18Feb 12Feb 5Feb 1Jan 28Jan 18

First freeze in fall

The chance of an earlier freeze than the date shown. At 10 percent, one fall in ten freezes before the date.

Threshold10%20%30%40%50%60%70%80%90%
36°FOct 7Oct 11Oct 14Oct 17Oct 19Oct 22Oct 24Oct 27Oct 30
32°FOct 16Oct 20Oct 23Oct 25Oct 27Oct 30Nov 1Nov 4Nov 10
28°FOct 24Oct 28Nov 1Nov 3Nov 6Nov 9Nov 14Nov 20Nov 27
24°FNov 2Nov 6Nov 11Nov 15Nov 18Nov 24Dec 1Dec 5Dec 14
20°FNov 12Nov 19Nov 24Dec 1Dec 4Dec 10Dec 20Dec 28Jan 4
16°FNov 29Dec 4Dec 11Dec 21Dec 29Jan 2Jan 7Jan 13Jan 22

Growing season length

Days between the last spring and first fall freeze at each threshold, with the chance of a season at least that long.

Threshold10%20%30%40%50%60%70%80%90%
36°F199193188183180176172166159
32°F220214208205201197193187180
28°F248238231226221216211206198
24°F280267260254248243237231221
20°F310300292285279272265257247
16°F344333325319310304298289276

How often it gets that cold

The share of years with at least one night at or below each temperature.

36°F or colder
100% of years
32°F or colder
100% of years
28°F or colder
100% of years
24°F or colder
100% of years
20°F or colder
100% of years
16°F or colder
97% of years

Degree days

A degree day is one degree of the daily mean temperature beyond a base, for one day. Heating degree days count cold (the fuel a house burns), cooling degree days heat, growing degree days the warmth a crop needs; each crop has its own base.

Heating degree days, base 65°F
2,955
Cooling degree days, base 65°F
1,611
Growing degree days, base 40°F
7,957
Growing degree days, base 45°F
6,359
Growing degree days, base 50°F
4,916
Growing degree days, base 55°F
3,641
Growing degree days, base 60°F
2,539

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January695034
February517058
March3777161
April17337325
May29153589
June1322771
July0425890
August0363828
September8248690
October14850377
November3976140
December610155

What this means

NOAA computes these from the daily lows at the station over 1991-2020, fitting the dates of each year's last and first freeze to a distribution, so a date can be stated at any level of risk. 36°F is a frost risk for tender plants on a clear, calm night, since the ground cools below the air above it; 32°F is a freeze; 28°F is a hard freeze that kills most annuals.

The station is 2.6 km from Camp Hill. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

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Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00011324 (Camp Hill 2NW). Public domain.